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What's your oppinion on bridging two channel amps?

I've been reading on the web about bridging two channel amps and it seems that some people believe it isn't a benefit. I've noticed that most manufacturers say that you should only use an 8 ohm speaker when bridging, but don't most speakers dip below 8 ohms? It probably varies from amp to amp on the benefits, but I was looking into purchasing a rotel rb980bx to use for a center channel amp and it has the capability to be bridged but some people said the sound was worse, just louder. What do you think about bridging my classe ca-150 for center channel duties and using a b&k st125.2 for front right and left channels? Thanks guys!

P.S. one of these days I'll quit posting new threads all the time, it's just that I know you guys (and gals) are experts. I really appreciate all the help and knowledge I've obtained from everyone out there. I'd be so much further behind if it weren't for you. Thanks.
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Showing 1 response by ngjockey

ngjockey
1,042 posts
 
Depends on the amps and the load. I have bridged Plinius amps going into 4 ohms but the speakers are magnetic planar and not reactive. They also crossed over above 100 Hz. Those amps also worked well with dynamic speakers I built but those had an unusual (series-parallel) rising impedance below 500 Hz. Most mid-woofers have a minimum impedance around 200 Hz. Some worse than others and compounded in parallel.

Been shopping for a pro amp for a subwoofer project. The subs are 4 ohms (nominal) each and I want to be able to use one or both. Most pro amps can be bridged but they have to be rated for 2 ohms stereo to be bridged into 4 ohms and that eliminates most but the "heavyweights".
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